Re: P4T533-C unstable with 1.5 GB RAM
- From: Barry Watzman <WatzmanNOSPAM@xxxxxxxxxx>
- Date: Tue, 16 May 2006 03:18:22 GMT
This is an RDRAM (Rambus) motherboard. There is a limit in the 850e chipset on that board as to how many CHIPS (not modules) the chipset can drive. Memory modules of the same size were made with different numbers of chips inside them; for example, some (early) 256 meg modules had 8 chips of 32 megs each, while some later ones had 4 chips of 64 megs each. The later modules with fewer chips place less of a load on the chipset than the earlier modules with more chips. This imposed a limit on the population of the memory slots that many people were unaware of. The number of chips on the modules is printed on the lable most of the time, for example I am looking at a module (defective, unfortunately) that says "512MB/16", that module has 16 chips in it. I do not remember the limit on the number of chips (and I think that the limit was "per channel", this was a dual-channel system).
Unfortunately, most motherboards are unstable when attempting to juggle the memory timing of running Four RAM sticks. You have discovered that as long as you limit yourself to three sticks or less your system is stable..
That is your answer.
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